Temp Display on A/C Unit, Degree F to Degree C ?

[Nick_USA]

I live in the USA and own a 2004 Boxster without the OBC switch:

My A/C unit displays temperature in Degree F but is there a way of changing the display to read degree C without the OBC switch?

(I have tried to re-circ plus temp + solution suggested elsewhere)

I know you can change your digital dash readout from metric to US by using one of the two knobs that change the trip meter and dash lights counter clockwise, but I'm not sure if this will change the HVAC readout.

I'll go take a peek in mine and report back.

Never mind, it only changes the speedometer, not the outside temp or the HVAC readout.